Rack-Mounting and Air Flow Clearance Guidelines
The Cisco ASR 9010 Router, Cisco ASR 9006 Router, Cisco ASR 9904 Router, Cisco ASR 9906 Router,
and Cisco ASR 9910 Router can be installed in most 2-post, 4-post, or telco-style 19-inch equipment racks
that comply with the Electronics Industries Association (EIA) standard for equipment racks (EIA-310-D).
The Cisco ASR 9922 Router and Cisco ASR 9912 Router can be mounted only in a 4-post rack. The rack
must have at least two posts with mounting flanges to mount the router chassis. The distance between the
center lines of the mounting holes on the two mounting posts must be 18.31 inches ± 0.06 inch (46.50 cm ±
0.15 cm).
Note
This figure shows an examples of typical 2-post and 4-post telco-type equipment racks.
Figure 10: Telco-Type Equipment Racks
Free-standing
enclosed rack
with perforated
sides and two
mounting posts
in the front.
c
Free-standing,
4-post open rack
with two
mounting posts
in the front, two
mounting posts
in the back or
along each side.
b
Telco-style rack
a
Telco 2-Post Rack
Item a in
Figure 10: Telco-Type Equipment Racks, on page 10
shows a telco-style rack. The
telco-style rack
is an open frame consisting of two posts tied together by a cross-bar at the top and a floor stand at the bottom.
This type of rack is usually secured to the floor and sometimes to an overhead structure or wall for additional
stability. The router chassis can be installed in the telco-style rack only in a front-mounted position.
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
10
Preparing for Installation
Rack-Mounting and Air Flow Clearance Guidelines
